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  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>
    const googleMap = {
      show: function () {
        console.log('谷歌地图开始渲染')
      }
    }
    const baiduMap = {
      display: function () {
        console.log('百度地图开始渲染')
      }
    }
    const baiduMapAdapter = {
      show: function () {
        return baiduMap.display()
      }
    }
    const renderMap = function (map) {
      if (map.show instanceof Function) {
        map.show()
      }
    }
    renderMap(googleMap)
    renderMap(baiduMapAdapter)
  </script>
</body>

</html>
